HV Exit Exam • Set 4 Question 21 of 30

What safety floor coverings are installed in front and rear of high-voltage switchboard panels?

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Direct Answer

Option B: Certified electrical insulating rubber mats

Tested and rated electrical insulation mats (IEC 61111 / Class 4) are mandatory along all operating pathways and rear maintenance passages of HV switchboards to isolate operators from ground.

All Options

Conductive grounding mesh

Certified electrical insulating rubber mats (Correct Answer)

Steel chequered plates

Ceramic unglazed tiles

Detailed Explanation & Context

Tested and rated electrical insulation mats (IEC 61111 / Class 4) are mandatory along all operating pathways and rear maintenance passages of HV switchboards to isolate operators from ground.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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